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  2. List of animals by number of neurons - Wikipedia

    en.wikipedia.org/wiki/List_of_animals_by_number...

    The human brain contains 86 billion neurons, with 16 billion neurons in the cerebral cortex. [ 2 ] [ 1 ] Neuron counts constitute an important source of insight on the topic of neuroscience and intelligence : the question of how the evolution of a set of components and parameters (~10 11 neurons, ~10 14 synapses) of a complex system leads to ...

  3. Machiavellian intelligence hypothesis - Wikipedia

    en.wikipedia.org/wiki/Machiavellian_intelligence...

    The claim that large brains are linked to large social groups in primates and cetaceans, on which the Machiavellian intelligence hypothesis is based, is criticized by a number of researchers for overlooking the availability of food as a common limiting factor for brain size and social group size. [citation needed] Among primates as well as ...

  4. Encephalization quotient - Wikipedia

    en.wikipedia.org/wiki/Encephalization_quotient

    Similarly sized brains, such as a cow or chimpanzee, might in that scenario contain very different numbers of neurons, just as a very large cetacean brain might contain fewer neurons than a gorilla brain. Size comparison between the human brain and non-primate brains, larger or smaller, might simply be inadequate and uninformative – and our ...

  5. Brain–body mass ratio - Wikipedia

    en.wikipedia.org/wiki/Brain–body_mass_ratio

    Recent research indicates that, in non-human primates, whole brain size is a better measure of cognitive abilities than brain-to-body mass ratio. The total weight of the species is greater than the predicted sample only if the frontal lobe is adjusted for spatial relation. [19]

  6. Brain size - Wikipedia

    en.wikipedia.org/wiki/Brain_size

    The size of the brain is a frequent topic of study within the fields of anatomy, biological anthropology, animal science and evolution.Measuring brain size and cranial capacity is relevant both to humans and other animals, and can be done by weight or volume via MRI scans, by skull volume, or by neuroimaging intelligence testing.

  7. 2024 in paleomammalogy - Wikipedia

    en.wikipedia.org/wiki/2024_in_paleomammalogy

    Aiken et al. (2024) report the earliest cetacean remains in the Black Sea region, and report that the harbour porpoise, the common bottlenose dolphin and the common dolphin were present in the Bosphorus as early as 8000–7800 years ago, and that cetaceans reached the northern and northeastern Black Sea, including the Kerch Strait, by 5500 ...

  8. Dunbar's number - Wikipedia

    en.wikipedia.org/wiki/Dunbar's_number

    Dunbar's number has become of interest in anthropology, evolutionary psychology, [12] statistics, and business management.For example, developers of social software are interested in it, as they need to know the size of social networks their software needs to take into account; and in the modern military, operational psychologists seek such data to support or refute policies related to ...

  9. 2023 in paleomammalogy - Wikipedia

    en.wikipedia.org/wiki/2023_in_paleomammalogy

    A study on the reproductive strategy of Plesiaceratherium gracile is published by Lu et al. (2023), who report evidence of singleton pregnancy, suckling for 2–3 years and sexual maturity by approximately 5 years of age, and postulate that the evolution of litter size in odd-toed ungulates is determined by singleton pregnancy since the Eocene.